4 O’Donnell, K., & Mulligan, G. Aug. 2008. “Parents’ Report of the School Readiness of Young Children from the National Household Education Surveys Program of 2007.” National Center for Education Statistics. First Look http://nces.ed.gov/pubs2008/2008051.pdf.

7 Coleman-Jensen, Alisha, Christian Gregory, and Anita Singh. Household Food Security in the United States in 2013, ERR-173, U.S. Department of Agriculture, Economic Research Service, September 2014. Table 3. http://www.ers.usda.gov/media/1565415/err173.pdf.